mod tests;

pub fn gray_code(n: u32) -> u32 {
    let mut result: u32 = n & 1 << 31;

    for i in (1..32).rev() {
        let n_bit = n >> i & 1;
        let n_right_bit = n << 1 >> i & 1;
        result = result | (n_bit ^ n_right_bit) << i >> 1;
    }
    result
}